Earnings Per Share (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Net income (loss) attributable to MasTec:
Net income (loss) - basic	$ 95,240	$ 14,296	$ 88,048	$ (50,702)
Net income (loss) - diluted	$ 95,240	$ 14,296	$ 88,048	$ (50,702)
Weighted average shares outstanding:
Weighted average shares outstanding - basic (in shares)	78,044	77,640	78,004	77,418
Dilutive common stock equivalents (in shares)	869	815	797	0
Weighted average shares outstanding - diluted (in shares)	78,913	78,455	78,801	77,418
Anti-dilutive common stock (in shares)	3	0	171	1,091